(b)(4).Hazy smoke with a burning odor was observed from an infrequently used tdxflx during assay calibration with the access door open.A review of service history for the tdxflx, serial number (b)(4), did not identify any issues that may have contributed to the current complaint.A review for similar complaints against the tdxflx analyzer found no similar issues or trends identified.A review of the tdx/flx system operations manual gives adequate instructions for shut down of the analyzer and also advises keeping all access doors closed to prevent damage to the air heater and the photomultiplier tube while running.The ambassador configured the system 2 parameters to disallow assay runs with the access door open.Additionally, a review of the 2016 ul certification memo contains adequate information noting abbott diagnostic equipment and accessories are certified to the appropriate safety standards, and adequate protection is provided for the operator against spread of fire from the equipment.Based on this investigation no systemic deficiency or malfunction was identified for the tdxflx (list number 04a24-96), serial number (b)(4).
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